Object: UGC9762B On scan num: 893 Off scan num: 894 R.A.: 15.198898 hrs Dec.: 32.597235 deg On azimuth: 249.100275 deg On zenith dist.: 13.574509 deg Off azimuth: 248.624461 deg Off zenith dist.: 13.381050 deg MJD: 52244 UTC: 0.699271 Center freq.: 1409.975587 MHz Doppler: 0.00004073 Num. correlators: 2 Spectrom. atten.: 33 41 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 300 seconds
This spectrum is the integration of all data for the scan with spectra from both polarizations added together. The spectral intensities are Ssys * (on - off) / off, where Ssys is the system temperature in Jy. The system noise flux density equivalent is calibrated for each scan with a calibration noise source firing during each scan. The cal value, in Jy, is calibrated by comparison with a number of continuum sources as described in the summary web page
This is the section of spectrum measured to obtain the parameters listed below. The three horizontal dotted lines are the baseline, the peak level selected, and 20% of the peak level. The two vertical dotted lines mark the selected 20% line width edges. The solid horizontal line marks the velocity range chosen for the the line profile flux density integral. This spectrum has a second-order least squares fit baseline removed using most of the baseline shown in Figure 1.
Peak intensity: 0.027 Jy Lower 20% velocity: 2173.0 km/s Upper 20% velocity: 2361.4 km/s Systemic velocity: 2267.2 km/s Line width (20%): 188.5 km/s Profile integral: 4.10 Jy * km/s A: 3.60 B: 4.16 Ratio B/A: 1.157 Flux integral velocity range: 2147.3 - 2376.4 km/s
shallow low velocity wing, fairly poor SNR